Analysis on the development trend of packaging ind

2022-08-21
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Analysis of the development trend of the packaging industry

with the national attention to white pollution, using environmental friendly materials instead of foamed plastics as cushioning packaging materials has become a development trend of cushioning packaging, and full paper packaging has also become a new favorite of modern packaging that avoids trade barriers and is suitable for the bonding of diverse materials. In recent years, the structural development of paper packaging materials has developed rapidly. The structure of cushioning materials has also changed from single type to complex type, from process type to functional type. Taking paper honeycomb materials, corrugated board and pulp molded products as examples, this paper summarizes the structural development of cushioning paper materials

paper honeycomb material

paper honeycomb is famous for its light weight, environmental protection, sound insulation, shock resistance, high cost performance and other advantages. It is mainly used to make buffer pads to absorb the impact or vibration of products during transportation or loading and unloading. The structural forms of paper honeycomb mainly include regular hexagon, hexagon with reinforcing strip, rectangle, prism, corrugated, square, sparse circle, dense circle, triangle, etc. The traditional paper honeycomb structure is hexagonal. It is pasted by multi-layer paper staggered, dried, cut into pieces, and then pulled apart to form a hexagonal structure. Hexagonal paper honeycomb is a labor-intensive product, which is not suitable for fully automated production

in 2000, Pflug applied for the patent of folding corrugated paper honeycomb, which is made by using the original corrugated board production line and adding the processes of slitting, rotating, folding and pasting. Corrugated paperboard folded honeycomb is difficult to paste and cut. Corrugated paperboard honeycomb has very high one-way compression strength, which is especially suitable for the cushioning packaging of heavy products

in 2004, basily invented the 3D paper honeycomb made from direct paper by means of molding process. It is suitable for automatic production and has isotropy in two orthogonal directions. Such packaging materials can enable producers to reduce costs, save space and use materials at least. It is a new force leading the reform and innovation of packaging materials. The 3D folded paper honeycomb core in Figure 3 is processed from kraft paper, which can be produced from flat paper. 3D folding paper honeycomb core adopts new packaging machinery technology, which can be produced at high speed, and its production cost is lower than that of the traditional paper honeycomb core

The most important feature of 3D folded paper honeycomb cores is that they can absorb a lot of energy compared with the current honeycomb structure in terms of damage prevention and earthquake resistance. In addition, the 3D folding core can improve the energy absorption rate of unit material and reduce its cost

chevronpattern folding method invented by basily and Elsayed can be made into cubic blocks or cylindrical barrels to play a buffer role. Chevronpattern folding core can greatly reduce the size and weight of the package, save the manufacturer's resources and funds, and realize the lightweight of the package in the transportation process

because 3D folded paper honeycomb can rotate, wind, and bend, it can be easily used to process any packaging products. The packaging made of 3D folded paper honeycomb is relatively small, light, and has a better role in protecting products. Irregular fragile products can be wrapped with 3D folded paper honeycomb and placed in other packaging containers. With the new paper folding technology, there is no need to print on the packaging, and this folding technology can be used to make the company's logo, the required solid color, etc. 3D folded paper honeycomb can not only promote sales, but also protect products from impact and vibration

in order to further improve the processing performance of paper honeycomb core and improve its automatic production capacity, in 2007, the author developed a variety of honeycomb sandwich structures suitable for paper processing, which are made of corrugated paper with alternating large and small corrugations

corrugated cardboard

in order to replace foamed plastics, people have used corrugated cardboard structure to develop a variety of corrugated cardboard combined cushioning packaging materials. In 1996, kimdowook and kimkijeong developed double ply reinforced corrugated board on the basis of the original corrugated board, changing the interlayer of the original three-layer corrugated board into two corrugated layers, increasing the thickness of the corrugated board basically without increasing, but it is troublesome to deal with them when dealing with the compression strength of the corrugated board

myunghoonlee et al. Conducted four point bending experiments along the MD direction and CD direction on five different structural forms [single-layer SW, double-layer DW, single-layer with double sandwich DM, double-layer with a double sandwich (AA +aflute) DMA, and double-layer with a double sandwich (AA +bflute) DMB]. The results showed that the corrugated board with the new structure had better structural advantages compared with the traditional corrugated board. Guo Juan and others also conducted a comparative experiment on 4-layer double ply corrugated board and 5-layer corrugated board. Guoyanfeng et al. Analyzed the structural characteristics of X-PLY super strong corrugated board and carried out comparative tests on bursting strength, puncture strength, flat pressing strength and edge pressing strength. In 2007, the author tested the static and dynamic compression properties of various corrugated composites, and compared the bearing and cushioning properties of different corrugated composites. Folding corrugated composites have high load-bearing performance and large static buffer energy absorption. They are more suitable for cushioning packaging of products with heavy weight and hard surface. The cushioning properties of 0/90/0 overlapping corrugated composites and 0/0/0 parallel overlapping corrugated composites are very similar. Their bearing capacity is not high, but their resilience is good. They are more suitable for the packaging of products with poor surface hardness, fragility and low brittleness value

the bearing capacity of corrugated/honeycomb/corrugated composites largely depends on the mechanical properties of honeycomb sandwich. Corrugated/honeycomb/corrugated composites greatly increase the thickness of the composites with few materials. 2 Cultivate a batch of innovative complexes, and its buffering and energy absorption efficiency is higher than that of simple corrugated stacking. Later, the author improved the original corrugated sandwich structure and invented the high elastic corrugated cardboard structure

pulp molded products

pulp molded products are mainly used in the inner packaging of industrial products, egg trays, fresh fruit trays, food and semi-finished product packaging, medical appliance packaging, special materials for making children's toys, drama props, handicraft bottoms, furniture, parts and components, military, clothing and other industries. Pulp molded products are generally processed with multiple sets of molds. With the improvement of mold technology, cavity pulp molded products can be produced at present. This kind of pulp molded products are mostly used as containers or decorations. The combined processing form is to realize some application needs and complete the required packaging functions through the combination of multiple pulp molds with different shapes during molding. In foreign countries, disposable pulp molded urinals have replaced the multiple use urinals made of polyester materials. Therefore, with the improvement of mold technology, the structure of pulp molded products tends to be more and more complex and meticulous

in addition to the traditional honeycomb paperboard, corrugated paperboard and pulp model products, foamed paper particles that meet the needs of environmental protection are also gradually developed and applied to the cushioning of electronic products. A company in Hamburg, Germany, chopped the waste paper and mixed it with starch, made the slurry into particles, put it into a sealed container, applied high pressure and high temperature steam, and then rapidly reduced the pressure. In recent years, the particles were packed with foam, forming porous pellets into foam packaging materials, which can be used as buffer materials, and the buffer performance is better than EPS. Suitable for cushioning packaging of electronics, instruments and sensitive materials

to sum up, with the increasing demand for environmental protection and packaging reduction in recent years, as well as the further improvement of electromechanical technology, the structure of buffer materials has developed rapidly, and buffer materials and structures with different structures suitable for special products have emerged. The structure of cushioning materials has changed from single type to complex type, from process type to functional type. The paper honeycomb has developed from the traditional structural change to the innovation of molding process; Corrugated board has also changed from a single corrugated structure to a corrugated composite structure; With the further improvement of mold technology, pulp molded products are becoming more and more meticulous and complex in structure

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